Weather Alerts for Pennsylvania

Recent Locations: Corona, CA Pasadena, CA Erie, PA

Current Alerts for Erie, PA: Extreme Cold Warning Winter Weather Advisory

1. Extreme Cold Warning for: Carbon; Monroe

2. Extreme Cold Warning for: Clearfield; Northern Centre; Southern Centre; Cambria; Blair; Somerset; Bedford

3. Extreme Cold Warning for: Huntingdon; Fulton

4. Extreme Cold Warning for: Mercer; Venango; Forest; Butler; Clarion; Jefferson; Armstrong; Westmoreland Ridges; Fayette Ridges; Indiana; Higher Elevations of Indiana; Eastern Preston

5. Extreme Cold Warning for: Mifflin; Juniata; Franklin; Union; Snyder; Montour; Northumberland; Columbia; Perry; Dauphin; Schuylkill; Lebanon; Cumberland; Adams; York; Lancaster

6. Extreme Cold Warning for: Northern Clinton; Northern Lycoming; Sullivan; Southern Clinton; Southern Lycoming

7. Extreme Cold Warning for: Northern Erie; Southern Erie; Crawford

8. Extreme Cold Warning for: Warren; McKean; Potter; Elk; Cameron; Tioga

9. Extreme Cold Warning for: Wyoming; Lackawanna; Luzerne

10. Wind Advisory for: Carbon; Monroe

11. Wind Advisory for: Clearfield; Northern Centre; Southern Centre; Cambria; Blair; Somerset; Bedford

12. Wind Advisory for: Huntingdon; Fulton

13. Wind Advisory for: Mifflin; Juniata; Franklin; Union; Snyder; Montour; Northumberland; Columbia; Perry; Dauphin; Schuylkill; Lebanon; Cumberland; Adams; York; Lancaster

14. Wind Advisory for: Northern Clinton; Northern Lycoming; Sullivan; Southern Clinton; Southern Lycoming

15. Winter Weather Advisory for: Cambria; Somerset

16. Winter Weather Advisory for: Northern Erie; Southern Erie; Crawford

17. Winter Weather Advisory for: Westmoreland Ridges; Fayette Ridges; Higher Elevations of Indiana; Ridges of Eastern Monongalia and Northwestern Preston; Preston

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Current U.S. National Radar--Current

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National Weather Forecast--Current

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National Weather Forecast for Tomorrow

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North America Water Vapor (Moisture)

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Weather Topic: What are Fractus Clouds?

Home - Education - Cloud Types - Fractus Clouds

Fractus Clouds Next Topic: Freezing Rain

A fractus cloud (scud) is a fragmented, tattered cloud which has likely been sheared off of another cloud. They are accessory clouds, meaning they develop from parent clouds, and are named in a way which describes the original cloud which contained them.

Fractus clouds which have originated from cumulus clouds are referred to as cumulus fractus, while fractus clouds which have originated from stratus clouds are referred to as stratus fractus. Under certain conditions a fractus cloud might merge with another cloud, or develop into a cumulus cloud, but usually a fractus cloud seen by itself will dissipate rapidly.

They are often observed on the leading and trailing edges of storm clouds, and are a display of wind activity.

Next Topic: Freezing Rain

Weather Topic: What is Graupel?

Home - Education - Precipitation - Graupel

Graupel Next Topic: Hail

Graupel is a form of precipitation that is created by atmospheric conditions which cause supercooled water droplets to contact snow crystals and freeze to their surface.

Sometimes known as soft hail or snow pellets, graupel is delicate and easily destroyed by touch. Whereas hail usually falls during severe weather, graupel doesn't require such conditions to form, and can form in mild precipitation similar to situations which produce snowfall.

Next Topic: Hail